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CHEMISTRY MCQs

MCQs on Freezing Point of the Solvent

MCQs on Freezing Point of the Solvent Which one of the following gases has the lowest value of Henry’s law constant? N2 He H2 CO2 Answer: (d) If 10ml of 0.1M aqueous solution of NaCl is divided into 1000 drops…

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2 years ago

MCQs on Cell Constant and Electrochemical Cells

MCQs on Cell Constant and Electrochemical Cells Oxygen has a +2 oxidation state in H2O H2O2 F2O SO2 Answer: (3) Which of the following is the strongest reducing agent? Li Na Mg Ca Answer: (1) When the salt bridge is…

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2 years ago

MCQs on Compounds of Transitional Elements

MCQs on Compounds of Transitional Elements The 3d transition series contains elements having an atomic number from 21 to 30 21 to 31 22 to 30 21 to 29 Answer: (a) The first transition element is copper nickel scandium vanadium…

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2 years ago

MCQs on Water or Hydride of Oxygen

MCQs on Water or Hydride of Oxygen Water is oxidised to oxygen by H2O2 KMnO4 ClO2 fluorine Answer: (d) The H-O-H bond angle in a water molecule is about 90o 105o 135o 180o Answer: (b) The action of water or…

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2 years ago

MCQs on Reversible and Irreversible Reaction

MCQs on Reversible and Irreversible Reaction The net energy change in a reversible cyclic process is 3/2 RT zero always > 0 always < 0 Answer: (b) Which of the following is an extensive property? temperature pressure mass/volume ratio energy…

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2 years ago

MCQs on Law of Mass Action

MCQs on Law of Mass Action Which of the following is not correct? the rate law is an experimental fact, but the law of mass action is theoretical the rate law is always different from the expression of the law…

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2 years ago

MCQs on Kp And Kc Relationship And Characteristics Of K

MCQs on Kp And Kc Relationship And Characteristics Of K What will be the value of Kp if the Kc is 26 for a reaction, PCl5 ⇌ PCl3 + Cl2at 25o°? 0.57 0.46 0.83 0.61 Answer: (d) For which of the…

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2 years ago

MCQs on Electrical Conductors, Arrhenius Theory and Ostwald’s Dilution Law

MCQs on Electrical Conductors, Arrhenius Theory and Ostwald’s Dilution Law If a conductor length is increased, 100% then keeping all other parameters fixed, what will be the increase in power dissipate? 100% 200% 300% 400% Answer:(b) What happens to the…

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2 years ago

MCQs on Hydrogen Ion Concentration pH Scale and Buffer Solution

MCQs on Hydrogen Ion Concentration pH Scale and Buffer Solution Range of pH scale is 7 to 10 0 to 10 0 to 14 7 to 14 Answer: (c) Level of pH found in antacid solution ≤ 6.5 ≥ 7.0…

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2 years ago

MCQs on 2nd and 3rd Law of Thermodynamics and Entropy

MCQs on 2nd and 3rd Law of Thermodynamics and Entropy Which of the following processes is used to do maximum work done on the ideal gas that is compressed to half of its initial volume? isothermal isochoric isobaric adiabatic Answer:…

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2 years ago

MCQs on Alkane

MCQs on Alkane Which of the following conformation of n-butane is the most stable? (a) eclipsed (b) gauche (c) staggered (d) skew boat Find the correct order for relative energies of the ethane conformations (a) staggered < skewed < eclipsed…

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2 years ago

MCQs on Alkene

MCQs on Alkene Which of the following compounds react most readily with Br(g)? (a) C2H2 (b) C3H6 (c) C2H4 (d) C4H10 When propene reacts with HBr in the presence of peroxide, it gives rise to (a) allyl bromide (b) isopropyl…

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2 years ago

MCQs on Half-Life

MCQs on Half-Life How many milligrams of tritium will remain after 49.2 years if the starting amount is 32 mg? The half-life of tritium is 12.3 years. (a) 8 mg (b) 2 mg (c) 1 mg (d) 4 mg Find…

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2 years ago

MCQs on Acid-Base Titration

MCQs on Acid-Base Titration What is the molarity of the solution of barium hydroxide, if 35 ml of 0.1 M HCl is used in the titration of 25 ml of the barium hydroxide solution? (a) 0.35 (b) 0.07 (c) 0.28…

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2 years ago

MCQs on Acid Rain

MCQs on Acid Rain The main contributors of acid rain are (a) sulphur oxides and carbon oxides (b) nitrogen oxides and sulphur oxides (c) carbon dioxide and carbon monoxide (d) nitrogen oxides and carbon oxides Answer: (b) Who coined the…

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2 years ago

MCQs on Distillation

MCQs on Distillation A mixture of o-nitrophenol and p-nitrophenol can be separated by (a) crystallisation (b) chromatography (c) sublimation (d) steam distillation Answer: (d) The commonly used method to separate naphthalene from benzoic acid is (a) sublimation (b) crystallisation (c)…

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2 years ago